Rex Energy Corporation operates as an independent condensate, natural gas liquid (NGL), and natural gas company in the Appalachian basin in the United States. It focuses on the Marcellus Shale, Utica Shale, and Burkett Shale drilling and exploration activities. As of December 31, 2016, the company had estimated proved reserves of 647.8 billion cubic feet equivalent; and owned interests in approximately 559.0 condensate, NGL, and natural gas wells. Rex Energy Corporation was founded in 2007 and is headquartered in State College, Pennsylvania.